SSL error while trying to Validate User in VIP Web Service

I am trying out the VIP Web Service but cannot get my client code to authenticate with the Service. I get a SSL/TLS error in the vipSoapInterfaceService.Validate() method. The URL that I am trying to hit is the Pilot URL (https://pilot-services-auth.vip.symantec.com/val/soap)

I have a Trial VIP Manager account and have already installed the Certificate by following the steps described in the VIPAuthWebServices.pdf document. Please help me out here.